/Engine/Source/Runtime/NavigationSystem/Public/NavigationSystem.h
Note that this function was only deprecated for blueprint in 5.1 Note2: originally deprecated as 4.22, bumped up to 5.1 as per comment above.
static bool K2_GetRandomPointInNavigableRadius ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, const FVector & Origin, FVector & RandomLocation, float Radius, [ANavigationData](API\Runtime\NavigationSystem\ANavigationData) * NavData, [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UNavigationQueryFilter](API\Runtime\NavigationSystem\NavFilters\UNavigationQueryFilter) > FilterClass )